CODEWITHSUNDEEP
pythonwindowspathinstallation
nitrl
nitrl

Reputation: 2485

Starting different python versions from the command line

The setup: Win7 environment with Python 2.7.5 and Python 3.3.2 installed and added to the system path.

C:\\py -2

will launch Python 2.7.5,

C:\\py -3

will launch Python 3.3.2,

C:\\python

will launch Python 3.3.2.

Is it possible to toggle which Python version "python" maps to, and if so, how?

Upvotes: 0

Views: 359

Answers (1)

Tim Peters
Tim Peters

Reputation: 70602

In your last line, Windows picks the first directory on your %PATH% containing a python executable. You cannot change that, short of reordering your path.

I use this little py.bat file in a directory early in my path:

\python27\python.exe %1 %2 %3 %4 %5 %6 %7 %8 %9

So I just type py. I have a similar py3.bat to start Python 3 instead. Inside other .bat files I call py.bat or py3.bat, so they all pick up the version of Python I want when I change py.bat and/or py3.bat.

Edit: by the way, I realize my py.bat's name conflicts with the Python launcher named py. I don't care :-)

Upvotes: 2

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